(Invited) Tungsten-Based Intermetallic Compound As Catalyst for Structure-Specific Growth of Single-Walled Carbon Nanotubes

Monday, 29 May 2017: 09:00
Churchill B1 (Hilton New Orleans Riverside)
Y. Li and F. Yang (Peking University)
Different from the conventional mono-metal catalysts, tungsten-cobalt intermetallic compound W6Co7, which belongs to monoclinic crystal system, presents lower structural symmetry and a very unique atomic arrangement. Therefore, W6Co7 exhibits specific geometry match towards the end structures of single-walled carbon nanotubes (SWNTs). This kind of one-by-one recognition between a crystal plane to a certain chirality of SWNTs enables this tungsten-based intermetallic compound an efficient template for structure-specified growth of SWNTs. This idea was revealed by both DFT simulation and the result of chemical vapor deposition growth of SWNTs. The manipulation of the structures of the W6Co7 catalysts was also performed to meet the requirements of the selective growth of SWNTs with different chiralities.